ONE QUESTION, ONE STEP
ZX-DE4DFAB5EC2025年6月国际A卷 · 第 1 题
2025年6月国际A卷 · 原库模块 2 · Q1 原库参考解析
A business owner purchased an energy-efficient air conditioning system for a cost of $4,200, including installation. The business owner saves $940 per year to operate the new system compared to the operating cost of the old system. Including the cost of the new system, which function \( f \) gives the total amount, in dollars, the business owner has saved \( x \) years after purchasing the new system?
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